14 CAR pt. 21, Appendix G
The slope across the drain field starting from the first line to the last line is < 6 inches.
The outlet flow line of the septic tank is at or above the highest ground elevation within absorption area.
Distribution box height is not critical.
Fig. 2
Elevation change from the first line to last line is ≥ 6 inches.
Outlet flow line of D-box is at or above the ground elevation of the highest line of the absorption area.
Fig. 3
Fig. 4
Figure 5
Location of the distribution box or septic tank outlet determined by the fall across the absorption field. See 14 CAR § 21-807 (e) and 9.11.6
Note: Capping material must extend 10 ft. from trenches before the start of the slope. The tapered slope shall be 3:1 or less.
Fig. 6
(6% - 12% Slope)
Fig. 7
(6% - 12% Slope)
fig.8
(3% or greater slope)
fig. 9
18" Trench Depth
fig. 10
(Top Down Loading Configuration)
Figure 11 Grease Interceptor Design
NOTES: